So the print came out pretty good and pushed in with a very slight press fit

As the pictures will show I used the stock battery holder that comes with the taranis that holds 6 AA batteries and as the thingyuniverse page suggests you can use the + and - tabs with a little modification, hence cutting, and you have all the parts except you'll need a 2S balance plug

The short wire on one side of the battery holder is about 1.5" long as the wires on the plug side are about 4" long and you should make the red wire a little longer so it curves around the black wire under the battery holder so everything fits fine

I also had to make the positive battery tabs a little pointier so that they'd reach the positive side of the battery better

I show the tool I use to hit the positive battery tabs with and how to make a small hole in a piece of wood to allow the battery tab to extend in the as you hit it with the tool and a hammer. Go a little at a time and not too far as it will poke through and ruin the positive battery tab

The negative just needs to be cut to size

Ultimately if you have a 18650 battery charger this is really cool especially if you already have the fatshark goggles battery holder that also uses 18650 batteries

Thanks for checking out my post and hope this works well for you if you decide to do this project and thanks again to the designer and the printer that helped me make this possible

Extra's:

While doing this project I thought to myself that I never use 4 switches on my Taranis so why have them as do I also never use the heavy metal handle on the back of the transmitter so I removed them all and eliminated over two ounces on it's total weight ...lol